1 Generally, only use three colors, black, white, grey. For attraction，use color。
2 16 Slices often use 15min. The first one -- introduce ourselves is about 21 seconds.
3 when we are talking about a slice from different part, we could use several slice with same content but different color, the part we want to talk is black, others are grey.
4 when talking about something important, we could slow down a little bit.
5 DONOT add punctuation at the end of phrase.
6 if the theme of several slices are the same, then (cont.) should be add to slices except first one.
For example:
first slice about objectives: objectives
second slice about objectives: objectives (cont.)